August 26, 2014, Guangzhou Salvage Bureau of the Ministry of Transport in the waters near the small mountains of the island will sink for a year in one fell swoop 57,000-ton bulk cargo ship "long summer" wheel and drag the whole salvage safe waters. The project set a world bulk tonnage salvage shipwrecks overall record, becoming by far the largest overall tonnage of cargo shipwreck salvage project.

"Summer Long" round last August by the typhoon sank under the organization and coordination of the Guangdong Maritime Bureau and Zhuhai Maritime Bureau, Guangzhou Salvage Bureau of the Ministry of Transport to the scene first time anti-oil operations and Tanmo jobs and in November officially launched the "Summer Long" round the whole salvage project. Now, after more than nine months of hard construction, followed by the completion of the cabin unloading and ship wreck Righting to floating three main stages, "summer long" round was successfully salvage, project a complete success.

"Ute" thrown to the steel wheel

August 14, 2013, Hong Kong nationals bulk carrier loaded with 55,000 tons of nickel ore "summer long" round Typhoon "Ute" attacks, a small square in the Pearl River Estuary Island southerly direction about 1.2 nautical miles (113 55.3883 21 ゜ ゜40.470) leftist sank all 21 crew to abandon ship. Difficult in the boat more than 700 tons of oil continue to spill the sea, the situation is very critical. Guangdong Maritime Safety Administration under the organization, Zhuhai Maritime Bureau of the Ministry of Transport Guangzhou Salvage Bureau for the first time send a professional ship stationed in the field, completed the underwater Tanmo and anti-oil work.

September-October 2013, the Ministry of Transport Guangzhou Salvage Bureau under British insurance companies pay UK P & I Club commissioned the successful completion of the "summer long" wheel pumping project. Given the professional performance in pumping project, the Ministry of Transport Guangzhou Salvage Bureau successful bid "long summer" wheel wreck removal works, and was officially launched in November salvage.

Protection of the marine transportation difficulties

"Summer Long" round sink located at the Pearl River estuary, is the movement of vessels in the roads; and there are more than 700 tons of oil continues to spill inside the boat, to the marine environment, especially near the fishing grounds is a serious threat. If not promptly eliminate hidden dangers, it may cause significant damage to shipping, economic and ecological.

Guangzhou Salvage Bureau of the Ministry of Transport as a rescue professional, "national team", the firm performance of their duties, the difficulties. However, salvage job is a multi-disciplinary engineering, related to the process is very complex, each shipwreck situations and environments are different, not to mention such a steel ship loaded with goods. The project became the Chinese fishing industry have never encountered difficulties and challenges.

The sinking of the "long summer" wheel 189.99 meters long, 32.26 meters wide, almost the length of two football fields. As the volume is too large, it sank to 22 meters in depth of the seabed and buried four meters of mud, there are still about 2.5 meters above sea level starboard. In addition, the "summer long" in-wheel cargo loaded with 55,000 tons of nickel ore, 104-degree left-leaning state hard ship sank allow efficient unloading equipment no "useless", the number of discharge as much difficulty of ever.

Bad weather and sea conditions a tremendous impact on the salvage operation. Between November last year to April this year, the operating waters in the northeast monsoon season, the sea is often 8-10 gust, waves up to 3.5 meters. In mid-July, the super typhoon "Ramasun" After operating waters, has prepared more than a month since the float was interrupted. Under the influence of the typhoon, the ship sank hard state changes, and there are many structures tearing and damage, extremely difficult to challenge the overall salvage work.

It is reported that since the "long summer" round salvage project started, Guangzhou Salvage Bureau of the Ministry of Transport has invested 4000t floating crane "Tianlong", 900t crane "South Dragon", 500t crane "South Pacific", "South Tianshun "4 engineering ships, as well as" Edward "," Deshun "," German crown "," Dickson "four tugs, salvage involved in field engineering staff of more than 200 people. Under coordination of the Ministry of Transport salvage bureau, also from Shanghai Salvage Bureau, Yantai Salvage Bureau were called world's most advanced attack submarine mud guide, hydraulic winch, lift floating barge common booster "long summer" round salvage.

New Process help new record

How to overcome the difficulties, no doubt is an advanced technical capabilities and strong professional strength. Guangzhou Salvage Bureau of the Ministry of Transport's field investigation and careful planning, we completed a highly innovative salvage project. Not only through a number of complex processes in the entire salvage salvage operations, more creative use of new technologies, to become the strongest driving force refresh record.

Discharging a "summer long" The first step to salvage the round, which is the most important basic work. "Summer Long" round 104 degrees left-leaning state means Shen cargo port side facing the sea below sea grab large equipment can not play a role. To overcome this problem, the Ministry of Transport Guangzhou Salvage Bureau engineers chose the shipwreck starboard water hole portion, each hold open two 3m × 3m square hole, and the whole open a total of 10 shipwrecks. Such pore size and distribution arrangement may not affect the entire ship's hull strength, and protect every cargo discharge conditions there. Then, using a hydraulic cutter dredge pump and the flow of pneumatic equipment pumping mud ore unloading work. Both rigs are utilizing hydraulic power and airlift force, the extraction of nickel ore cargo within the sea, and then dumping the cabin away.

For the "long summer" wheel pull positive, Guangzhou Salvage Bureau of the Ministry of Transport of suction anchor device creatively introducing fishing craft, this is the first time in the world outside. According to the site, technical staff also conducted a suction anchor design modifications to make it more in line with demand, "summer long" wheel Righting job. 14 suction anchors were sunk on the "long summer" round 200 meters west of the sea, and is connected by a wire and hard to starboard. When the linear winch to tighten the wire, each suction anchors offer 300t of pull positive force, 14 suction anchors can reach 4200t-- This equates to pull 8500t floating crane vessel provided positive moment! In addition, the engineering staff is also innovative in the use of pontoons, by injection water ballast to increase positive pull force. 4 800t engineering staff to wreck the starboard pontoon mounted, through its increased height 8.5m strand Righting arm, and clever use of irrigation pumping characteristics can float in the wreck Righting an angle of 70 degrees to float within water, with its hard starboard ballast weight increase Righting force.

In the final stage from the float, Guangzhou Salvage Bureau of the Ministry of Transport to take "external integration" manner to floating wreck. On the one hand, through the airtight chamber pump and pumping the water from inside the ship warehouse way to make itself a tremendous inner hull buoyancy; on the other hand, the salvage site brings together four large floating crane, the lifting force to assist in pulling lift drifting boat. Thanks to this method of combining internal and external, "summer long" round finally surfaced from the sea.

"The hardest salvage" to highlight the strength of maritime power

"Summer Long" rear wheels sank, the Ministry of Transport Guangzhou Salvage Bureau without conditions, no matter the cost, quickly dispatched the first time, have been completed and anti-oil pollution and salvage work, demonstrating the Guangzhou Salvage Bureau of the Ministry of Transport as a national professional salvage salvage forces, in order to ensure national maritime transport safety, to maintain clean oceans play an important and irreplaceable role in safeguarding security.

"Summer Long" round salvage as "the world's largest ever tonnage of bulk cargo shipwreck salvage the overall project" milestone. "Summer Long" round salvage process, Guangzhou Salvage Bureau of the Ministry of Transport independently developed a number of new technologies, new processes, mobilization of a large number of professional equipment, fishing techniques and equipment in the world advanced level, highlighting the country continues to build in the oceans to enhance the strength, but also a concrete manifestation of the comprehensive national strength.

Successful salvage "long summer" wheel fully demonstrated Guangzhou Salvage Bureau of the Ministry of Transport has a skilled and salvage projects, experienced, excellent skills, strict management, unity and cooperation of professionals; with the international advanced salvage expertise and equipment, has the ability to act as a salvage mission to the country, have the ability to defend the national waters safe, practical national marine development strategy, efforts to achieve marine power. (Reprinted from: Guangzhou Salvage Bureau website)